Claustrophobia
Claustrophobia, is a fear of of being in confined spaces.  Someone who has this fear might say that there is no easy way out.  This phobia is an anxiety disorder, and the person who has it is very anxious about being closed in.  Symptoms are:  sweating, hyperventilation or over-breathing, shaking, nausea or light-headedness.  One thing that you might observe in a person with this phobia is that when they walk into a room, they first look for the exits.  They may also panic if a door is closed behind them.  Places where they might panic might be on buses, airplanes, lifts (elevators) or in rooms with lots of people.